huge cpu load due to prl_vm_app

With build 3810 (and the latest Parallels Tools), I get the same.

Setting to 2 or 4 processors, the VM kernel panics while booting. Setting to 1 processor runs OK.

This is with MacOS X Server VM.

Screenshot is just the usual MacOS X kernel panic "You need to restart" screen on the VM.
 
VM unusable after 4.0

I'm in the same boat. I've got a MacBook Pro with Intel Core 2 Duo, and parallels 4.0 is such a cpu hog that Windows XP which was formerly quite spritely is ossified. This really needs fixed; I don't like using windows but for some things its necessary. Forget about using SAS or Arcview.... Please fix this ASAP.

Cheers,

S.

Eddy-VI-2:~ rsh5$ prl_perf_ctl -a -l 10
Performance Counters View Utility v4.0.3844.408728
Copyright 2009 Parallels, Inc.

Eddy_VI_XP (1) - 02:54:01 +10 sec
devices.ide0.aligned_writes 0
devices.ide0.fsync 0
devices.ide0.new_blocks_created 0
devices.ide0.read_requests 0
devices.ide0.read_total 0
devices.ide0.unaligned_writes 0
devices.ide0.write_requests 0
devices.ide0.write_total 0
devices.usb.ehci.activity 0
devices.usb.ehci.ioasynccallback 0
devices.usb.ehci.process_frame 0
devices.usb.ehci.processpkt 0
devices.usb.ehci.vcpusignal 0
devices.usb.ehci.vcpusignal.aa 0
devices.usb.ehci.vcpusignal.flr 0
devices.usb.ehci.vcpusignal.int 0
devices.usb.ehci.vcpusignal.pcd 0
devices.usb.ehci.vcpusignal.ue 0
devices.usb.uhci.activity 0
devices.usb.uhci.ioasynccallback 0
devices.usb.uhci.process_frame 0
devices.usb.uhci.processpkt 0
devices.usb.uhci.vcpusignal.total 0
kernel.ide.irqs 98627
kernel.paging.vcpu0.cr3_change 0
kernel.paging.vcpu0.cr3_flushtlb 0
kernel.paging.vcpu0.cr3_read 0
kernel.paging.vcpu0.cr3_write 0
kernel.paging.vcpu0.pf.genexc 0
kernel.paging.vcpu0.pf.gexc_pcreset 0
kernel.paging.vcpu0.pf.gexc_recheck 0
kernel.paging.vcpu0.pf.invalid 0
kernel.paging.vcpu0.pf.mspc 0
kernel.paging.vcpu0.pf.pagefault 0
kernel.paging.vcpu0.pf.prot 0
kernel.paging.vcpu0.pf.success 0
kernel.paging.vcpu0.pf.wmapped 0
kernel.usb.ehc.irqs 0
kernel.usb.uhc.irqs 0
kernel.vcpu0.activity.guest_mcs 0
kernel.vcpu0.activity.guest_proc_halt 0
kernel.vcpu0.activity.idle_percent 2
kernel.vcpu0.activity.mon_artloop_halt 0
kernel.vcpu0.activity.mon_mcs 2168
kernel.vcpu0.activity.quest_acpi_halt 0
kernel.vcpu0.activity.send_halt_msg 0
kernel.vcpu0.activity.send_halt_msg_delay 0
kernel.vcpu0.async_thr_activate 0
kernel.vcpu0.guest_switch_sd 0
kernel.vcpu0.guest_switch_svm 0
kernel.vcpu0.guest_switch_vtx 18
kernel.vcpu0.hardware_interrupt 2
kernel.vcpu0.irq_process 479721
kernel.vcpu0.mode_switch 0
kernel.vcpu0.mon_ret_to_host 21
kernel.vcpu0.mon_ret_to_host_switch 21
kernel.vcpu0.pic.setintrequest 2461138
kernel.vcpu0.sendapirequest 551571
kernel.vcpu0.sendapirequest_lastcmd 0
kernel.vcpu0.vtx_interrupth 36161135
kernel.ws.effective 0
kernel.ws.pagein 0
kernel.ws.pageout 0
kernel.ws.pages 77980
net.nic0.activate 0
net.nic0.bcast_in 0
net.nic0.bytes_in 0
net.nic0.bytes_out 0
net.nic0.mcast_in 0
net.nic0.pkt_dropped_in 0
net.nic0.pkt_err_in 0
net.nic0.pkt_err_out 0
net.nic0.pkts_in 0
net.nic0.pkts_out 0
net.nic0.send_buffer_notifications 0
video.frames 0
disp_server - 02:54:01 +10 sec
mgmt.commands 0
mgmt.error_commands
 
Upgraded from 3.x to 4.x last week, prl_vm_app utilization goes over 100% (i've seen as high as 150% in activity monitor). Checked CPUs, no yellow triangle. Scanned for changes, nothing.

Running XP SP3, 2 CPU, 2000 GB of RAM assigned to VM. Machine is an 8 month old MacBook Pro 15", 2.4 Ghz, 4 GB RAM. Would appreciate any tips/suggestions.

-------
UPDATE: Uninstalled and reinstalled parallels tools, no longer seeing high CPU utilization for prl_vm_app.
 
Last edited:
spoke too soon, even after re-installing tools I find that after a few hours of use, parallels goes to over 100% CPU utlization and becomes unusable. I am unable to shut down windows due to lack of response from VM. If I force quit parallels it freezes activity monitor (and i can't even run a ps command from within terminal). I have to reboot the mac before I can use parallels again.

Does anyone have a fix?
 
Did Parallels (or someone else) ever fix this?

I've also started getting >100% CPU usage thanks to prl_vm_app and haven't been able to fix it. This thread started 8 months ago--was a solution ever found?
 
PD4 on MacPro becomes unusable

Hello Parallels team,

I have also the same severe issue with PD4 on my MacPro 2009/MacOSX 10.5.8/WinXP/3GB.
After a few hours of use, Parallels PD4.0.3844 goes to over 100% CPU utlization and becomes unusable. I am unable to shut down windows due to lack of response from VM.

This thread exists since over 8 months. Nothing happens.

Can you fix it asap please?

Thank you!
px
 
I had this problem; while researching it here on the forum I took a look at Device Manager and found that one of the two processors was listed as "unknown" and had a red "X" in the icon. I used the add hardware wizard to find and install a new driver for the second processor. Relief was immediate.
 
Unfortunately, something has undone the benefit of the new driver; my usage is now extremely high again (>130%) and the only remedy I can find is to suspend the guest OS (WinXP home).
 
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